{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular*}{\hsize}{@{\hskip\tabcolsep\extracolsep\fill}l*{6}{c}}
\toprule
                           &\multicolumn{2}{c}{Democratic Vote}          &\multicolumn{2}{c}{Republican Vote}          &\multicolumn{2}{c}{Incumbent Vote}           \\\cmidrule(lr){2-3}\cmidrule(lr){4-5}\cmidrule(lr){6-7}
                           &\multicolumn{1}{c}{(1)}&\multicolumn{1}{c}{(2)}&\multicolumn{1}{c}{(3)}&\multicolumn{1}{c}{(4)}&\multicolumn{1}{c}{(5)}&\multicolumn{1}{c}{(6)}\\
                           &\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}&\multicolumn{1}{c}{Model}\\
\midrule
\emph{Panel A: OLS}        &                      &                      &                      &                      &                      &                      \\
Cumulative capacity (MW)   &        0.006\sym{*}  &                      &       -0.006\sym{*}  &                      &       -0.002         &                      \\
                           &      (0.003)         &                      &      (0.003)         &                      &      (0.003)         &                      \\
Cumulative count           &                      &        0.011\sym{**} &                      &       -0.011\sym{**} &                      &       -0.004         \\
                           &                      &      (0.005)         &                      &      (0.005)         &                      &      (0.004)         \\
\bottomrule
\end{tabular*}
}
{
\def\sym#1{\ifmmode^{#1}\else\(^{#1}\)\fi}
\begin{tabular*}{\hsize}{@{\hskip\tabcolsep\extracolsep\fill}l*{6}{c}}
\toprule
\midrule
\emph{Panel B: IV}         &                      &                      &                      &                      &                      &                      \\
Cumulative capacity (MW)   &        0.030\sym{**} &                      &       -0.030\sym{**} &                      &        0.008         &                      \\
                           &      (0.011)         &                      &      (0.011)         &                      &      (0.013)         &                      \\
Cumulative count           &                      &        0.050\sym{**} &                      &       -0.050\sym{**} &                      &        0.013         \\
                           &                      &      (0.019)         &                      &      (0.019)         &                      &      (0.021)         \\
\midrule
Observations               &         1143         &         1143         &         1143         &         1143         &         1038         &         1038         \\
States                     &           25         &           25         &           25         &           25         &           24         &           24         \\
\(R^{2}\)                  &         0.88         &         0.88         &         0.88         &         0.88         &         0.73         &         0.73         \\
\bottomrule
\multicolumn{7}{l}{\footnotesize \sym{*} \(p<0.10\), \sym{**} \(p<0.05\), \sym{***} \(p<0.01\)}\\
\end{tabular*}
}
